Obama is apologizing to Americans who have found themselves in that situation based on assurances they got from him. He tells NBC News that the administration will do everything it can to help people who are in a difficult situation because of the cancellations.

Obama for years told Americans that under his health care law, if they liked their health insurance, they would be able to keep it.

But millions are receiving cancellation notices in the mail. The White House in recent days has clarified that people can keep their plans as long as insurance companies haven't changed the plans since the law was enacted.